A ball of mass, m is thrown straight up and rises h afterleaving your hand, it momentarily stops. Acceleration due togravity g is downward. Ignore air resistance.
Part A (5 points): If the ball is the system, and the Earth isthe surroundings, what is the change in potential energy, ΔUsys ofthe system, and what is the work done, Wsurr by the surroundings?
Δ Usys = 0; Wsurr = -mgh
Δ Usys = mgh; Wsurr = -mgh
Δ Usys = mgh; Wsurr = 0
Δ Usys = 0; Wsurr = 0
Δ Usys = -mgh; Wsurr = 0
Part B: If the ball + Earth is the system, and nothing is in thesurroundings, what is the change in potential energy, ΔUsys of thesystem, and what is the work done, Wsurr by the surroundings ?
Δ Usys = 0; Wsurr = 0
Δ Usys = mgh; Wsurr = -mgh
Δ Usys = mgh; Wsurr = 0
Δ Usys = 0; Wsurr = -mgh
Δ Usys = -mgh; Wsurr = 0
